Resources Contact Us Home
Device for determining swing speed of rotatable implements

Image Number 4 for United States Patent #4788863.

A device for determining swing speed of rotatable implements, for example human activated sporting goods such as a bat, a tennis racquet, etc. The device comprises a mounting base, a magnetically attractable arcuately movable member in the form of a metal plate, a stopper, the movable member upon activation coming into contact with the stopper to produce a hitting sound, a support member detachably supporting the movable member, and a rotatable disk magnet likewise supported by the support member, the movable member being rotatably movable through a rotational arcuate width between the stopper and the support member. The device further comprises a counter which may be contacted by the movable member to detect numerical frequency of rotations of the movable member.

  Recently Added Patents
Method and system for utilizing Perovskite material for charge storage and as a dielectric
Intelligent sensor network
Interposer having molded low CTE dielectric
Detecting mirrors on the web
Synergistic fungicidal interactions of 5-fluorocytosine and other fungicides
Receiver with feedback continuous-time delta-sigma modulator with current-mode input
Method for driving bistable display device
  Randomly Featured Patents
Method for achieving roaming capabilities and performing interactive CGI implanting, and computer games using same
Combined linear and rotary actuator and floating ring gear
Artificial stone composition and method of manufacturing artificial stone
Vehicle air conditioner compressor mounting bracket
Beard trimmer
Spiro (2H-1,4-benzodioxepin-3 (5H)4-piperidine and -3-pyrrolidine) compounds and their use as anti-hypertensive agents
Monolithic catalyst for exhaust gas purification
WDM optical transmission system
Use of diallyldimethylammonium chloride acrylamide dispersion copolymer in a papermaking process
String stabilized ribbon growth a method for seeding same